69 lines
1.1 KiB
Go
69 lines
1.1 KiB
Go
package rpi
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import (
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"fmt"
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"sync"
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"github.com/warthog618/gpiod"
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)
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// BasicLight is a BasicLight implementation for the Raspberry Pi
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type BasicLight struct {
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pin int
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line *gpiod.Line
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manager *Manager
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isOn bool
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isOnLock sync.Mutex
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}
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// On turns on the light
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func (bl *BasicLight) On() error {
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bl.isOnLock.Lock()
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defer bl.isOnLock.Unlock()
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if bl.isOn {
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return nil
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}
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err := bl.line.SetValue(0)
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if err != nil {
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return fmt.Errorf("failed to set pin %d to low (on): %w", bl.pin, err)
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}
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bl.isOn = true
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return nil
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}
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// Off turns off the light
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func (bl *BasicLight) Off() error {
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bl.isOnLock.Lock()
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defer bl.isOnLock.Unlock()
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if !bl.isOn {
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return nil
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}
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err := bl.line.SetValue(1)
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if err != nil {
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return fmt.Errorf("failed to set pin %d to high (on): %w", bl.pin, err)
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}
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bl.isOn = false
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return nil
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}
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// State of whether the light is on or off
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func (bl *BasicLight) State() (isOn bool, err error) {
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bl.isOnLock.Lock()
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defer bl.isOnLock.Unlock()
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return bl.isOn, nil
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}
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// Close underlying open connection
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func (bl *BasicLight) Close() error {
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return bl.manager.closeLine(bl.pin)
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}
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